Image-projecting machine.



W. R. DUNHAM. y IMAGE PROJECTING MACHINE. APPLlcMmN man :UNE 17. |915.

Patented Apr. 11,1916.

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' w.4 R. DUNHAM,

' IMAGE PRJECTING MACHINE.

APPLICATION FILED IUNE If?, I9l5.

1,178,786. Patented Apr. 11,1916.

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WILLIAM R. DUNHAM, OF WEBB CITY, MISSOURI.'

IMAGE-PROJECTING IlVIACHINEi Application led June 17, 191.5.

To all whom t may concern:

Be it known that I, VILLIAM R. DUNHAM, a citizen of the United States, residing at lVebb City. in the. county'of Jasper' and State of Missouri, have invented 'certain new and useful Improvements inpnflimage'- Projecting Machines; and I do declare the following to be a full, clear', and exact description of the invention, such as will enable others skilled in the art to which it appertains to make-and use the same.

My invention relates broadly to the lclass of optics and more particularly to image projecting machines designed primarily for the projecting of advertisements, upon suitable screens.

The main object of the invention is to provide a machine of this class which will not only be very ei'licient in operation, but which may be easily and inexpensively manufactured.

To the above end, a further object lies in the provision of construction whereby certain adjustments may be made yfor allowing more or less advertisements to be displayed.

Yet 'another object is to construct the device in such a manner as to-.allow the projecting light and the lens in advance thereof to retain the same relative relation in respect to the images, regardless o f the amount of adjustment made.

lVith the foregoing and numerous minor objects in View, the invention resides in certain novel features of construction and combination herein described and claimed. In describing the invention I shall refer to the accompanying drawings wherein like refer'v rence characters designate corresponding parts throughout the various views' and wherein:

Figure 1 is a side elevation of a projecting machine constructed in accordance with my invention; Fig. 2 is a top plan view thereof; Fig. 3 is a rear end view; Fig. 4 is a vertical transverse section as seen along the plane designated by the line 44 of Fig. l; and. Fig. 5 is a diagrammatic perspective view illustrating more particularly the ini termittent feed mechanism for successively advancing the numerous advertisements, and the commutator for intermittently illuminating the projecting light.

speci-manon of Lettersjgatent. Pdteuted Apr, 11,' 1915,

` ings 18 and in advance f the bearings '14,

Serial No. 34,730.

ln these figures, constituting a part of the application, 1 designates a horizontal elongated base which may be of ,any preferred design. Secured to the intermediate edge portions of the base l, upon the upper side thereof, is a pair of longitudinally dis,- posed tracks 2, which are here shown of dove tail formation in transverse section. Rising from the base 1 at the rear ends of the tracks 2, is a pair of fixed rear standards' 3 whose tops are connected by a transverse bar 4, while'their lowerends are preferably provided with slides 5` clamped upon the rear ends of the. tracks 2 by set screws 6 or the equivalent thereof.

Extending forwardly from the upper ends of the two standards 3 and secured thereto in any appropriate manner, is an upper pair` of tracks7 which lie parallel to and are of L nally upon the tracks 2 and which may be lockd in adjusted position on said tracks by the provision of set screws 12 or the equivalent thereof.

The rear' fixed standards 3 are provided on their rear sides with upper bearings 13 and lower bearings. 14, the former revolubly supporting a shaft upon which right and left guide sprockets 15 are secured, while the latter are provided Ato rotatably support i right and left driving sprockets 16, one of which is provided with a plurality of laterally extending studs or projections 17 designed for a purpose yet to be described. Immediately in advance of the bearings 13, the front movable standards 10 are provided with bearings 18 in which an upper shaft having right and left guide sprockets 19 is revolubly mounted while below the bearsaid front standards 10 are equipped with additional bearingsQO in which the shaft of lower right and left guide sprockets 21 is revolubly mor nted.

Passing around the two driving sprockets 16, and around the guide sprockets 13, 19 and 21,l is a pair of endless elements 22, herein shown in the form of sprocket chains which may be lengthened` or shortened in any well known manner to support the desired riumber of panel receptacles 28 which are pivotally supported therebetween and in which transparent panels 24, containing the advertising matter to be displayed upon the screen,are removably mounted in any appropriate manner. It will be noted that the receptacles 23 are so supported upon tire chains as to allow them to 'always assume an upright position, this being essential in order that rays of light may be successively projected through the individual panels as they travel in advance of light projecting means now to be described. A

The aforesaid projecting means comprises an electric light 25 which is mounted on a light bracket 26 carried by the front movable standards 10; a lens 27 likewise carried by said standards and disposed immediately in advance of the light 25, but in rear of the front upright series of panels 24; and an additional and longitudinally adjustable lens support 28" which is carried by an upright 29 rising from the front end of the base 1, said support 28 being equipped with any preferred types of lenses, for accomplishing the best results. It is .to be observed that regardless of the positioning of the front standards l0 in respect to the rear standards 3, the front series of panels, the lenses 27, and the light 25, will always assume the same relative positions, this being a salient feature of the invention.

Operating in conjunction with the construction so far described, is means for intermittently advancing the two chains 22 and the panels carried thereby, to succes-h sively position the latter in advance of the lense's 27, and additional means for intermittently illuminating the light 25, it being understoodthat the latter` is flashed after each individual panel is moved to the proper position in respect thereto. For so advancin-g the chains 22, a slowly rotated driving shaft 30 is positioned transversely in rear of the rear standards 3- and is provided with a laterally extending arm 31 which f projects into the rotary path of the projections 17 on the left hand sprocket 16, whereupon each revolution of the shaft 3() will rotate the two gears 16 a predetermined p0rtion of a revolution, thus intermittently advancing 'the Chains 22 and the advertising panels carried thereby.

Secured to the driven shaft 30 is a commutator 32 which comprises an insulating ring 33 surrounding said shaft and in turn partially surrounded by a split contact ring 3ft, the gap of this ring beingfilled by in sulatrng material extending from the ring the drivinu' shaft 8O aithouffh in the d b i u 33 as clearly disclosed in Fig. for contact with the periphery of the contact ring 34, is a brush 35 from which a current conducting wire 36 leads to a battery 37 or other appropriate source of current supply, an additional wire 38 being shown as leading from said battery te one terminal of the light 25, While yet another wire 39 continues from the opposite termi-- nal of said light and is electrically connec in any preferred manner to the ring this construction, the insulation in the g ,i between the ends of the split ring 34:, will; contact with the brush 35 while the is advancing the chains 32 to position one of the panels 2a in advance 'of the light 25, but the moment this advancing is cc pleted, one end of the split ring 3ft comes in contact with the-brush T55, thus instantly completing the circuit of the light and advancing the latter'. The result is tha image imprinted upon the panel being d played, is projected through the lenses in the support 2S, upon any appropriate type of screen (not shown).

lt will be understood that any preferred means may be provided for slowly rotating er, w

ings appropriate speed reducing gea. is shown for this purpose, said gearing ing driven by a worin and worm geni. from an electric motor 4t2.

From the foregoing description, tatiein connection with 'the accompanying ings, it will be evident that although coin p aratively simple construction has been gn M vided for carrying out the objects of the iii-- vcntion, the complete machine will be very efficient in operation. ljarticular empha is laid upon the construction for allen r the chains 22 to be lengthencd or siiorienen for the purpose of carrying more or lass advertising panels, due consideration bcigrg directed to the fact that the lens 2i', and the light 25 are movable with the standards li), While the lens support or carrier 2S is adu justable,longitudinally within the guide car ried by the upper end of the standard Needless to say, these are very salient fea-- tures of the invention and perform 'their proiec nt supporting member, combined with an intermittently advanced endless element pass.

2. A projecting machine comprising arigid rear supporting member having a guide, a movable front supporting member in advance of the rear member andhav1ng upper and lower guides, a lens carried by the movable supporting member, intermittently actuated light projecting means, in

rear of said lens, combined with an intermittently advanced endless element passing around the several guides, and transparent panels carried by said endless element and j traveling in advance of the lens.

3. Av projecting machine comprising a rigid rear supporting member having a guide, a movable front supporting member in advance of the rear member and having upper and lower guides, a lens carried by the movable supporting member, and intermittently actuated light projecting means likewise carried by said movable member and' disposed in rear of the lens, combined with an intermittently advanced endless element passing' around the several guides, and transparent panels carried by said endless elements and traveling'in advance of the lens.

4. A projecting machine comprising 'a base, a'rig'id rear standard rising therefrom, a lower track in advanceof' the rear standard, an upper track projecting forwardly from the upper end of the same, va movable front standard whose upper and lower ends are slidably engaged with the upper and lower tracks, releasable means locking said front standard against movement, and front and rear guides carried by the front and rear standards, combined with an intermittently advanced endless element passing around the front and rear guides, transparent panels carried by the endless element, and intermittently actuated light projecting means in advance 'of which the panels travel.

5. A projecting machine comprising electrically operated light projecting means, and

a plurality of transparent panels travel-.

ing 1n advance of saidmeans, combined with a movable panel advancm wheel having a plurality of nircumferentially spaced projections, a rotated driving shaft,a laterally projecting arm thereon disposed in the path of the projections,` a commutator carried by the shaft, a brush bearing on said commutator and an electric circuit including the light projecting means, the commutator and 'the brush.

6. A projecting machine comprising a base, 'a pair of spaced upright standards ris-- ing therefrom, a pair of parallel tracks extending forwardly from the standards and carried by thevbase, an additional pair yof spaced upright standards having slides shiftable longitudinally on the tracks, `a lamp bracket rigidly connecting the additional upright standards, guides carried by the two pairs of standards, a flexible endless member trained around said guides and carrying a number of transparent panels, a lamp carried by the lamp bracket, and means for advancing the endless member to successively dispose the panels in .advance ofr the lamp. v n

7. A projecting machine comprising a base, a pair of spaced upright standards rising therefrom, a pair of parallel undercut tracks extending forwardly from the standards and carried by the base, a pair of slides snugly engaging the undercut tracks and movable longitudinally thereon, means for normally preventing movement of the slides,

an additionalpair of upright standards ris-r ingr from the slides, guides carried by the two pairs of standards, anendless member trained around said guides .and carrying a number of transparent panels, a source of light, and means for intermittently advancing the endless member to successively dispose the panels in advance of said source of v `slotted front extremities, an additional pair of upright standards having slides movable longitudinally on the first-named tracks and having their upper ends disposed adj acent the slotted terminals of the additional tracks, clamping bolts passing through said through the slots of said terminals, and means for normally preventing movement of the slides on their respective tracks, combined with guides carried by the two pairs of standards, an endless member passing around said guides and carrying a number of transparent panels, a source of light, and

means for intermittently advancing the endless member to successively dispose the panels in advance of said source of light.

vupper ends of the additional standards and 9. A projecting machine comprising a' base, a pair of parallel horizontal tracks carried thereby, a rear pair of slides on said tracks and means for normally preventing movement thereof, a rear pair of upright standards rising from the rear slides, a front pair of upright standards rising from the front slides, additional horizontal tracks secured to one pair of standards and having sliding connections with the' other pair, guides carried by the two pairs of standards, a flexible member trained around said guides L12/eme and carrying a plurality of ,transparent my hand in presence of two subsribng Witpanels, a source of light, and means for innesses.

termittently advancing said member to suc- WILLIAM R. DUNHA Wl'. cessiveiy. dispose the panels in .advance of VVitnesseS; y 5 .said source of light. E. H. SIMPSON In testimony whereof I have hereunto set M. R. LIVELY.

Gopies 'of'thil patent may be obtained for ve cents each, by addressing the "Commissioner )f Patents,

' Washington, D. C. 

